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F. LUD INGTON.

UHROMATIG PRINTING MACHINE. No. 365,313. Patented June 21,1887.

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F. H. LUDINGTON. GHROMATIG PRINTING MAGHINE.

' Patented June 21,1887.

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' GHROMATIG PRINTING MAGHINE. No. 365,313. I Patented June 21, 1887.

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FRANCIS H. LUDINGTON,

OF ST. LOUIS, MISSOURI.

CHROMATIC-PRINTING MACHINE.

SPECIFICATION forming part of Letters Patent No.365,313, dated June 21, 1887.

Application filed July 3, 1886. Serial No. 207,155. (No model.)

To all whom itmay concern.-

Be it known that I, FRANoIs H. LUDINe- TON, of St. Louis, Missouri, have made a new and useful Improvement in Gl1r0matic-Printing Machines, of which the following is a full, clear, and exact description.

The improvement relates to that class of printingpresses which are used in printing in two or more colors.

It consists, mainly, in the use of peculiarlyconstructed complementary inking-rollers, by means of which a form can be inked in twoor more colors, which intersect each other, 'or which are included one within another, and so that by means of a singleimpression subse-. quently an impression in two or more colors, relatively arranged or disposed as described, can be obtained.

The annexed drawings, making part of this specification, exhibit the most desirable mode of carrying out the improvement, and they show whatever portion of the press is necessary to an understanding of the improvement. Figure 1 is a side elevation of the press.

Fig. 2 is an end elevation looking in the di rection of the arrow at, Fig. 1. f Fig. 3 is a detail, being a view in perspective of the device for smoothing the bags as they pass to the point where they are printed. Fig. 4 is a plan of the improved inking-rollers. The view showstwo inking-rollers, a portionof the form being inked, and the bed of the press. Fig. 5 is a longitudinal section of one of the inkingrollers. Fig. 6 is a view in perspective showing separated from each other the composite parts of the inking-roller, except the composition coating upon the roller. Fig. 7 is a crosssection of the inking-roller.. Fig. 8 is an impression printed from the form. Figs. 9 and 10 are respectively developments of the coatings upon the two inking-rollers, respectively;

and Fig. 11 is a side elevation from the opposite side to that shown in Fig. 1 of the mech anism used in operating the fountain-rollers.

The same letters of reference denote the same parts.

The press A, Fig. 1, is of the customary con-v struction, saving as it is modified by the present improvement. I

B C respectively represent the inking-rollers for applying the inks to the form D, Fig. 4.

The rollers 13 O are journaled in suitable bearings, so that they can be rotated reciprocatingly, as hereinafter described, and are provided with gears and connections, substantially as shown, by which the motion of the rollers is properly eii'ected. The motive mechanism of the press, however, being familiar, does not need to be described, saving as it relates especially to the improvement under consideration.

The principal feature of the inking-rollers is that they are complemental, one of them being shaped to ink a certain portion of the form and not to ink the remainder thereof, and the other of the rollers being shaped to ink that remainder and not to ink the portion touched by the first-named roller. To this end the inking-rollers are each provided with a coating, 1) c, of a material such as used in forming inking-rollers, and constructed, respectively, as follows: The coating 1), which is designed to ink the portions d of the form D, and not the portions d, is left its full diameter at b, and at the places 11, which in shape and position conform to the portions d of the form, is intagliated, substantially as shown in Fig. 4. The roller 13, therefore, receives ink at the places 12, and hence can transmit ink only onto the portions d of the form. The coating 0, on the other hand, is left its full diameter at c, and at the places a", which in shape and position conform to the portions d of the form, is cut away, substantially as shown in Fig. 4. The roller 0, therefore, receives ink at the places 0 only, and hence can transmit ink only onto the portions d of the form.

The two. coatings b c are properly adjusted upon their respective rollers, and the rollers are properly operated by means of the rack O, which engages with the gears b c of the rollers B C, respectively, so that the form D shall be entirely inked by means of the two inkingrollers operated in conjunction, the coating 1) being used to apply, say, red ink to a portion of the form, and. the coating 0 being used to apply, say, blueink to the remainder of the 'form. After the form has been thus inked,the

street the inking-rollers in the manner shown more fully in Figs. 4, 5, 6. A tube, b", slit longitudinally at Z), is at its ends attached to the parts I) If, which in turn are extended to form the journals of the roller.

1) are tubular sections of various lengths, which are adapted to be passed onto the tube 1), and held longitudinally in place upon the tube byv means of the collars V, which are screwed onto the parts N, as shown. The coating b encircles one of the parts If, and a longer or shorter part I) is used to suit the length of the coating. The other sections b are used to complete the roll at each side of the section which is supporting the coating, and when thus used they may be regarded as spacing devices for holding the coating and its section properly longitudinally in place upon the roll. When it is desired to change the coating, the roll is dissected, and the coating and its supporfingseetion I) are removed from the tube 1;" and another coating and section placed upon the tube b. As the coatings may be needed a second time, the practice is to store them away mounted upon their respective sections, the coating and section, as soon as the coating has been formed thereon, becoming in effect a single part. The sections b are kept from turning around upon the tube b by means of the projection b which engages in the slit If, but which permits of the sections being slipped endwise upon the tube. After the coating, withthose sections which are within it, have been removed from the tube 1), they can belaid away to be used again, if desired.

The rollers B G are each connected with a series of rollers,by means of which the ink is received, distributed, and applied to the rollers B G. The series B B B" B belong to the roller B, and the series (3'0 0 C to the roller 0. These rollers B, &e., O, 820., are not of themselves possessed of novelty; but the means for effecting the customary vibration of the rollers B 0", respectively, toward and from the rollers B G is considered novel, and as follows: The cylinder E is provided with the cam F, Fig. 1. This cam in its rotation causes the bell-crank G to turn on its pivot g, and in so doing to causethc arms H, in which the roller B is journaled, to turn on the pivot 71, and thereby move the roller Binto contact with the roller B The arm H, by means of the link I, is jointed to the arm J, which is pivoted at j, and carries the roller 0, and that roller in consequence moves with the roller B, and is brought into contact with the roller 0. The springs K act to move the rollers B" C backward into their original positions,when the cam ceases to act on the bell-crank G. The ratchets L L upon the rollers B C, respectively, are actuated by the pawls Z Z, respectively, upon the pivoted levers Z Z, respectively. These 1evers-the lever Z directly and the lever Z" by means of the link *are connected with the rod Z, which is moved in one direction by means of the spring Z Fig. 11, and in the opposite direction by means of the cam l", which is fastened to the cylindershaft at the opposite end thereof to that shown in Fig. 1, and the movement of the rod Z to and fro effects the vibration of the levers Z" Z The press here illustrated is especially de' signed for printing flour sacks and bags, which are fed past the gate M, Figs. 1, 3, onto the cylinder E, and downward onto'the form in the customary manner.

Experience has demonstrated the desirableness of employing a smoothing device, N, Figs. 1, 3, for smoothing the sacks and bags after they have been fed onto the cylinder. It consists of the brush a, fastened, as shown, to the farther side of the same shaft a, to which the arm m, that supports the gate M,is attached, so that when the gate is lifted the brush is lowered to bear upon the sack or bag, and so as to effect the desired smoothing. The shaft a is provided with a crank, n which in turn is connected with a rod, at, whose lower end a rides upon the cam a, that is fastened to the shaft 0, rotating therewith, and causing the rod a and crank a to be lifted, as well as the gate M, and the brush a to be lowered, as described. The spring a acts to reverse the movement when the cam a ceases to uplift the rod it.

Although the present press is adapted more especially to the printing of bags and sacks, such as used for holding flour, I desire not to be limited thereto, the improvement being suited for other kinds of presses-such, for instance, as used in printing posters.

I claim- 1. The hcreindescribed inking-roller, c011- sisting of the parts I) If, the slit tube b the collars b b, the sections 1), having the pro jection I), and the coating 6, substantially as described.

2. The combination, in an inking-roller, of the slit tube 1;, the sections 1/, having theprojection I), and the coating b, substantially as described.

3. The combination of the rack O and the inking-rollersB O, with the rollers BB" B B and Q C" O O, the link I, the rod Z", and the mechanism, as described, between the rollers B 0* and rod Z", and the cam Z substantially as described.

4. The combination of the brush a, theshaft n, the arm on, and the gate M, substantially as described.

5. The combination of the brush a, theshaft n, the arm in, the gate M, the crank n, the rod a, the cam 11", and the shaft a, substantially as described.

6. The combination of the cam F, the bell crank G, the arms H J, and the link I, as and for the purpose described.

7. The combination of the rollers B G, the ratchets L L, the pawls Z Z, the pivoted levers Z Z, the link Z, the rod Z", the spring Z", the cam Z and the shaft a, substantially as described.

8. In combination with the rollers B 0, each having, as described, gears If 0 at their respective ends, the rack O, the rollers B B B B, the pivoted arm H, the ratchet-wheels L and L, the rollers O O C O, the pivoted arm J, the pawlsl and Z, operated as described, and the spring K, substantially as and for the purpose set forth.

9. The combination of the cylinder E and the cam F with the bell-crank G, the rollers 13 and 0, each mounted in pivoted bearings, and the link Iand spring K, substantially as set forth.

10. The combination of the rollers 13' and 0 each mounted in pivoted bearings, with the rollers B 0*, ratchets L L, the rod Z and the mechanism, as described, between said ratchets and rods, and cam Z, the several parts constructed and all operated as set forth.

Witness my hand.

FRANCIS H. LUDINGTON.

Witnesses:

' 0. D. MOODY,

B. F. REX. 

